Download or read book MEASUREMENT OF THE B[sup 0] LIFETIME USING PARTIAL RECONSTRUCTION. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present here the first measurement of the B[sup 0] lifetime using partial reconstruction in B[sup 0] [yields] D*[sup -] [rho][sup +] decay. A sample of approximately 5500 B[sup 0] [yields] D*[sup -] [rho][sup +] events were identified among 22.7 million B[bar B] pairs collected by the BABAR experiment during the years 1999-2000. With this data, the B[sup 0] lifetime is measured to be 1.616 [+-] 0.064 [+-] 0.075 ps, in good agreement with the world average. This measurement demonstrates that is it possible to use this technique to perform time-dependent B[sup 0] decay analysis that is central to the measurement of the charge-parity (CP) asymmetries. Investigation of CP observables through measurements of the decays of B[sup 0] mesons is the primary goal of the BABAR experiment at the PEP-II storage ring located at Stanford Linear Accelerator Center (SLAC). As the B[sup 0] particle decays to final states that are directly sensitive to the CP parameter [gamma] are highly suppressed, a promising alternative approach is to use the final state B[sup 0] [yields] D*h. Using the partial event reconstruction analysis method it is possible to compensate for the small CP asymmetries in this decay.